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Which of the following would prompt for an entry by the user in a PL/SQL block?

A: select fn, ln
from students
where &where_clause
B: select fn, ln
from students
where +where_clause
C: select fn, ln
from students
where -where_clause
D: select fn, ln
from students
where mwhere_clause

A ____ operation takes its argument and places it into the buffer for storage.

A: out
B: put
C: in
D: one

The event attribute function of ____ returns the userid of the user that fired the trigger.

Which of the following is the proper syntax for declaring a parameter with the 'nocopy' hint?

A: parameter_name[mode]copy datatype
B: parameter_name[mode]status datatype
C: parameter_name[mode]new datatype
D: parameter_name[mode]nocopy datatype
Which of the following is a trace that is present in dbms_trace of 8.1.5?